US3709270A - Device for manufacturing tubular products - Google Patents

Device for manufacturing tubular products Download PDF

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Publication number
US3709270A
US3709270A US00079497A US3709270DA US3709270A US 3709270 A US3709270 A US 3709270A US 00079497 A US00079497 A US 00079497A US 3709270D A US3709270D A US 3709270DA US 3709270 A US3709270 A US 3709270A
Authority
US
United States
Prior art keywords
core
circular element
battens
bed
band
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00079497A
Other languages
English (en)
Inventor
V Abramov
Y Junga
G Berzin
B Priede
A Ziemelis
A Elksnis
Y Dalbinsh
K Rotsen
A Lugovskoi
F Shilgorin
V Skrupsky
P Frolov
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
INST KHIM DREVESINY AKAD NAUK
INST KHIMII DREVESINY AKAD NAUK LATVIISKOI SSR SU
Original Assignee
INST KHIM DREVESINY AKAD NAUK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from SU1369923A external-priority patent/SU301033A1/ru
Application filed by INST KHIM DREVESINY AKAD NAUK filed Critical INST KHIM DREVESINY AKAD NAUK
Application granted granted Critical
Publication of US3709270A publication Critical patent/US3709270A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27H—BENDING WOOD OR SIMILAR MATERIAL; COOPERAGE; MAKING WHEELS FROM WOOD OR SIMILAR MATERIAL
    • B27H1/00—Bending wood stock, e.g. boards
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27H—BENDING WOOD OR SIMILAR MATERIAL; COOPERAGE; MAKING WHEELS FROM WOOD OR SIMILAR MATERIAL
    • B27H5/00—Manufacture of tubes, coops, or barrels

Definitions

  • ABSTRACT A device for manufacturing tubular products from wooden battens by winding the battens on a rotating core with the aid of an endless driving band which presses the batten against the core, and a system of circular elements for ensuring continuous feed and compaction of the battens. 4
  • the present invention relates to the manufacture of products from plasticized wood and more specifically to devices for manufacturing tubular products from wooden battens.
  • An object of the invention is to eliminate the disadvantages of the known devices.
  • the main object of the invention consists in providing a device ensuring a continuous feed of the battens onto the core.
  • This object is accomplished by providing a device for manufacturing tubular products from wooden battens by winding the battens on a rotating core with the aid of a band pressing the batten against the core in which, according to the invention, the band is of an endless driving type moving in synchronism with rotation of the core and installed so that it fits around the core and in which there is a system consisting of at least two circular elements embracing the core one after another, with the first circular element relative to the start-of-winding point being set stationary with respect to the core and having a helical rear face surface serving as a guide for the batten being wound on the core while the second or last circular element is installed so as to be able to rotate in synchronism with the core and the band, and being provided with an internal tapered surface which narrows towards the outlet end with a clearance sufficient for the passage of the wound tubular product, and the second circular elements constituting, together with the core, a working capacitor.
  • Such a design ensures a continuous operating process in which a continuity is ensured by merely positioning each next batten on the helical surface of the first circular element.
  • FIG. 1 is a general schematic view partly in elevation and partly in cross-section of the device for manufacturing tubular products from wooden battens according to the invention
  • FIG. 2 is a view taken along line II-II in FIG. 1;
  • FIG. 3 is a view in perspective of a circular element with a helical face surface.
  • the device comprises a hollow core 1 (FIG. 1) installed on a bed B, (illustrated diagrammatically in the drawing) and rotated by an electric motor 2 via a transmission train 3.
  • the front circular element 4 (FIG. 3) is rigidly fixed on the bed at the start-of-winding point and is provided with a helical face surface 5.
  • the pitch of the helical surface is approximately equal to the width of the wound batten which makes it possible to wind the coils tightly to one another.
  • the second circular element 6 (FIG. 1) is installed after the element 4 and is also mounted on the bed but it can rotate in synchronism with the core 1.
  • the element 6 is rotated by the electric motor 2 via the transmission train 3.
  • the internal surface of the element 6 is tapered and narrows towards the outlet end.
  • the clearance between the element 6 and the core 1 is sufficient for the passage of the wound product.
  • An endless driving band 10 tensioned on pulleys 7, 8 and 9 (FIG. 1, 2) at the point of location of the circular element 4 passes around the element 4 and core 1 and presses a batten 11 against the core 1.
  • the band 10 is driven by a pulley 9 which is linked kinematically with the transmission train 3.
  • the transmission train is so designed as to drive the band 10 and rotate the core 1 and the circular element 6 in synchronism.
  • the batten used for winding must be plasticized. And this can be done by an ammonia treatment, by steaming or by another method.
  • One end of the plasticized batten 11 (FIGS. 1,2) is positioned on a flat surface 12. (FIG. 3) of the element 4.
  • the band presses the batten 1 1 against the core 1.
  • a support 13 adjoining the flat surface 12 ensuresa continuous contact between the batten and the core 1. Due to the helical shape of the face surface 5 of the element 4, the coils of the batten 11 are continuously displaced along the core 1. A tight closing of the coils to each other is ensured since the pitch of the helical face surface 5 is equal to the width of the batten 4 being wound. In addition, the helical face surface also compresses the coils. In order to fix the shape of the product more efficiently, there is a field of high frequency current induced between the core I and the circular element 6, with this field drying the tubular products.
  • the core 1 For feeding the high frequency currents, the core 1 is hollow and accommodates an electric conductor. Whereby the core 1 and the element 6 constitute a working capacitance, including the tubular product of wood therebetween.
  • a suitable power source having a frequency suitable for causing sufficient current in the tubular product is connected between the core 1 and the circular element 6. The details of such drying caused by circulating high frequency currents would be readily apparent to those skilled in the art.
  • the internal tapered surface of the element 6 consists of two sections with different degrees of taper.
  • the front section with relation to the start-of-winding point has a larger angle of taper while the rear section has a smaller angle of taper. This is required due to the nature of wood shrinkage.
  • the tapered surface of the element 6 is calculated so that after shrinkage, the batten is still pressed upon by the tapered surface.
  • the battens can be fed onto the circular element 4 continuously.
  • a device for manufacturing tubular products from wooden battens comprising: a bed; a core rotatably installed on said bed; a first circular element fitting around said core and fixedly mounted on said bed with relation to said core, said first circular element having a helical face surface serving as a guide for the battens being wound on said core; an endless driving band mounted on the bed, said band fitting partly around said first circular element and pressing said battens against said core; a second circular element fitting around said'core in spaced axial relationship to the first circular element, said second circular element being

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Manufacturing & Machinery (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)
  • Manufacture Of Wood Veneers (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
US00079497A 1969-10-10 1970-10-09 Device for manufacturing tubular products Expired - Lifetime US3709270A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SU1369923A SU301033A1 (de) 1969-10-10
US7949770A 1970-10-09 1970-10-09

Publications (1)

Publication Number Publication Date
US3709270A true US3709270A (en) 1973-01-09

Family

ID=26665361

Family Applications (1)

Application Number Title Priority Date Filing Date
US00079497A Expired - Lifetime US3709270A (en) 1969-10-10 1970-10-09 Device for manufacturing tubular products

Country Status (2)

Country Link
US (1) US3709270A (de)
DE (1) DE2049466C3 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021128087A1 (de) 2021-10-28 2023-05-04 Markus Frauenschuh Verfahren zum Herstellen eines Körpers aus gebogenem Holz

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US77036A (en) * 1868-04-21 Improvement in machines foe bending wood
US341866A (en) * 1886-05-18 allgire
US2392194A (en) * 1942-04-02 1946-01-01 Wurlitzer Co Apparatus for forming tubing

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US77036A (en) * 1868-04-21 Improvement in machines foe bending wood
US341866A (en) * 1886-05-18 allgire
US2392194A (en) * 1942-04-02 1946-01-01 Wurlitzer Co Apparatus for forming tubing

Also Published As

Publication number Publication date
DE2049466A1 (de) 1971-04-29
DE2049466C3 (de) 1975-12-04
DE2049466B2 (de) 1975-04-24

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